And I'm using this this for the armbands, trims and circles. It changes colour. Now that is called Kationic Silk and changes from green to gold, and was £8 a metre from one of my local shop but that was at half price. You'll be hard pressed getting it online, so I recommend trying in store if you want it. It's hard to get as it's Indian Silk, and you have to physically buy it in India - they don't ship it. THANKFULLY, the owners go to India every year.

Second one I actually looks more like Sylvie (Amora's human replacement that Loki gives magic powers to), but I'd go with bottle green lycra